Japanese Address System
Tokyo addresses follow a hierarchical grid: ku (ward) → chome (district) → ban (block) → go (building). The key insight is that buildings within a ban are numbered by construction date, not street position.
Take "Shibuya 2-15-1": 2 is the chome (a roughly rectangular district), 15 is the ban (a specific block within that district), and 1 is the go (the first building constructed on that block). To find it, locate chome 2, identify block 15, then look for building 1 within that block.
Utility poles display chome numbers, and neighborhood maps (machi-kuzu) at key intersections show the ban layout. With practice, you can navigate to any address without a phone.
chome-ban-go breakdown
chome
District (100-200m area)
ban
Block within chome
go
Building (by construction order)